8729945 has 8 divisors (see below), whose sum is σ = 11972544. Its totient is φ = 5986224.

The previous prime is 8729939. The next prime is 8729977. The reversal of 8729945 is 5499278.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8729945 - 2⁶ = 8729881 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 8729896 and 8729905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124679 + ... + 124748.

It is an arithmetic number, because the mean of its divisors is an integer number (1496568).

Almost surely, 2^8729945 is an apocalyptic number.

It is an amenable number.

8729945 is a deficient number, since it is larger than the sum of its proper divisors (3242599).

8729945 is a wasteful number, since it uses less digits than its factorization.

8729945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249439.

The product of its digits is 181440, while the sum is 44.

The square root of 8729945 is about 2954.6480331843. The cubic root of 8729945 is about 205.9067114597.

The spelling of 8729945 in words is "eight million, seven hundred twenty-nine thousand, nine hundred forty-five".